Vulcanizer



E. n. HOSTLER.'

VULCANIZER. APPLICATION fiLEn JULY 30.1919.

i YPatented,Apr. 27, 1920.

3 SHEETS-SHEET l.v

wir/058858 WM Patented Apr. 27, 1920.`

VULCANIZERI APPLICATION FILED .IULY 30.1919.

HSN

UNITED sTATEs PATENT ortica.

EDGAR ID. I-IGSTLER, OF TIPTO, IOWA, ASSIGNOR 0F ONE-HALF T0 HAMIEL @c MATHER, 0F TIPTON, IOWA, .A PARTNERSHIP.

vULcANIznR. Y

7D all whom wf' may concern:

Be it known that I, EDGAR l). Hos'rLEn, a citizen of the United States, and a resident of rlipton, in the county of Cedar and State of Iowa, have invented a new and Improved Vulcanizer, of which the following is a full, clear, and eXact description.

This invention relates to improvements in vulcanizers, and more particularly to an im* proved mandrel for use in vulcanizing. the ends of the inner tubes for tires and the like, an object of the invention being to provide a device of the character stated which permits the tube ends to be vulcanized on the outside thereof, thus permitting a ready manipulation of the tube so as to insure a proper positioning of the parts and also permit a full observation of the vulcanizing process.

A further object of the invention is to.

provide a mandrel having a plurality of vulcanizing surfaces of dlierent diameters and shapes .so as to accommodate various sizes of tube and permit various kinds of. vulcanizing processes to be carried out.

A further object is to provide a mandrel having a steam chamber therein which effectually 'heats the outer surface of the mandrel and which isinsulated by `means of an asbestos or other nonheat conducting lining 'from the inner surface of the man drel, and provide an entrancevslot or recess into the interior of the mandrel for the positioning of a tube end therein andlocate in said entrance slot a removable filler piece which conforms in shape to the inner and outer surfaces of the mandrel.

"With these and other objects in view'tlie invention consists in certain novel features of construction, and combinations and arrangements of parts, as Will be more fully hereinafter described and pointed out in the'claims.

In the accompanying drawings Figure 1 's a view in side elevation illustrating one form of my invention;

Fig. 2 is an end view thereof;

Fig. 3 is a view in longitudinal section showing a slightly modified shape of outer surfaces for the mandrel;

Specification of Letters Patent.

Application filed July 30, 1919.

Patented Apr. 2,7, 1920.

Serial No. 314,220.

Fig. l is aview in transverse section on theline 4 4 of Fig. 3;

Fig. 5 is a view in longitudinal section of the mandrel shown in Fig. 1, illustrating the method of vulcanizing thereon;

Figs. 6 and 7 are views in longitudinal section illustrating modifications; and

Figs. 8, 9, 10, 11, 12, 13 and 14: are views illustrating other modifications.

Referring particularly to Figs. 1, 2, 3, L1, 5, 6 and 7 1 represents the mandrel which is preferably integral with a base 2 and is provided .with a longitudinal 'cylindrical bore 3 having a lining 4 of asbestos or other non-heat conducting material therein. The body 1 is made with a steam chamber 5 which is supplied with the steam by means of circulating pipes communicating with the base 2. A

In Figs. 1, 2 and 5 the body l is formed exteriorly with la plurality of vulcanizing surfaces 7 of different diameters and of different inclination so that any surface desired may be utilized for vulcanizing.

ln Fig. 3 the outside face of the body is of general tapering or conical form which permits the vulcanizing process to be carried outl at any point on the conical vsurface in accordance with the diameter of the tube being vulcanized. An additional' vulcaniz* ing surface is provided by means of an eX- tension `8 on one end of the body and this Where the extension is.a separate piece,

it is understood it will fit snugly within the bore of the body and may be made taperingas indicated, and if desired, an annular shoulder 15, such as shown in Fig. 7, may be employed to limit the inward movement of the extension and insure a tight juncture against the body. It is, of course, td be understood Vthat the extensions will 'have similar asbestos or other non-heat conducting linings 14 land where the extensions are v separate pieces, they are preferably of two halves held together when in place in the body.

The body 1 is made with a longitudinal en;-

trance slot 9 through which the tube may be moved to position the same in the mandrel or to remove the tube tlierefrom.` This slot 9 is normally closed by a filler piece 10 whichmay be secured in any approved manner. I have illustrated as a securing means, transversely positioned pins 11 projecting through the filler piece 10 and resting in.

small recesses 12 in the body.

In the modification illustrated in Figs. .8, l9, 10, 13 and 111, the mandrel 16 is of general cylindrical form having a filler piece 17 therein, the latter engaging the body portion of the mandrel eby means of a longitudinal key 19 and groove 18 so that it can be slid readily Afrom the body, and the pin 2U in the filler piece limits the longitudinal movement in one direction. to hold the filler piece in normal position. This mandrel 16 is provided with a lining 4 and is made hollow forming steam. chamber 21 having steam pipes 22 communicating with the same at one end of the mandrel. 'llo increase the diameter of the mandrel, a removable shell 23, shown in Figs. 11, 12 and 13, may be employed. This shell is made of two halves fitting 'the mandrel 16 and having longitudinal flanges 21 which take the place of the :filler piece 17 and hold the shell on the` mandrel. The inwardly projecting flange 25 at one end of the shell bears against the end of the mandrel and limits its movement in one direction.

The tubes to be vulcanized are indicated by the reference numerals 26 and 27. A strip of quick curing gum 28 is used to join the two ends together and binding strips 29 are` used to hold the tube ends in vulcanizing position on the mandrel, as will now be explained.

In carrying out the method 'of vulcanizing on .my improved mandrel, the following steps are preferably employed.

The surfaces of the tubes 26 and 27 to be united are first roughcned slightly and then. washed with gasolene, after which a coating of quick curing vulcanizing cement is applied to the roughened surfaces. This is allowed to set for the proper time, say five minutes. A strip of quick curing gum indicated by the reference numeral 28 is then placed between the surfaces treated, as above, and allowed to set until the parts are connected. The tube is then inserted in the mandrel by first removing the filler` piece 10 and after the filler piece has been rcplaced', the tube 27 'is reversed or turned inside-out so 'that it will assume the position shown in Figs. o and 14. The point of vulcanizing is located on the proper surface of the mandrel to snugly fit the same, and the binding strip 29, preferably of rubber, is wrapped around the jointed ends of the tube to tightly hold the same against the vulcanizing surface of the mandrel. Steam is then admitted to the mandrel for the proper length of' time to thoroughly vulcanize the parts together. When the vulcanizing operation is completed, the strip v29 is removed and the tubeends removed from the mandrel.

Various slight changes may be made in y the general form and arrangement of parts 1. A device of the character stated, comprising a hollow mandrel having` an exterior vulcanizing surface, and a non-heat conducting lining in the interior of the mandrel.

2. A device of the character described, comprising a mandrel having a bore therethrough, a non-heat conducting lining in the bore, said mandrel having a steam chamber therein, and having an exterior vulcanizing surface. f

3. A device of the character stated, comprising a hollow mandrel having an eX- terior vulcanizing surface, a non-heat conducting lining in the interior of 'the Inandrel, said mandrel having'a longitudinal entrance slot communicating with the interiorv thereof, and a liller piece normally filling the slot.

f1. A device of the character described, comprising a mandrel having a longitudivnal bore and having a steam chamber therein, said mandrely having a longitudinal entrance slot, a filler piece normally closing the slot, said mandrel and filler piece having an inner non-heat conducting lining, and said mandrel having an exterior vulcanizing surface.

5. A device of the character described, comprising a mandrel having a longitiulinal bore and having a steam chamber there-- in, said. mandrel having a plurality of eX- terior vulcanizing surfaces of varying diameters and shapes. Y v

6. .A device of the character described, comprising a mandrel having a longitudi- .nal bore and having a steam chamber therein, an extension projecting from the mandrel and having a bore therethrough, and

a lining of non-heat conducting material in the bore of the mandrel and the extension.

'7. A device of the character described, comprising a mandrel having a longitudinal bore and 'having a steam chamber therein, said mandrel having a longitudinal entrance slot, a filler piece normally closing v.the slot, a shell adapted to fit the mandrel and provide a larger vulcanizing surfacei thereon, said shell consisting of two halves',v

and a longitudinal flange on each half adapted te enter Ythe entrance slot to replace the filler piece 0j the mandrel.

8. A device 0l the character described, comprising a 'mandrel having a longitudinal bore and havinga eteam Chamber therein. said mandrel having a longitudinal. entrance slot, a filler piece normally closing' the slot, a shell adapted te t the mandrel and pro- Vide a larger vulcanzng surface thereong 10 ing flange at one end of the Shell engaging 15 the end of the mandrel.

EDGAR D. HOSTLER. 

